Temperatures above the permitted temperature range over a longer period of time effect a permanent and considerable hardening of the vulcanized material and thus a sustained increase in the spring rate. Other temperature increases lead to a drop in structural strength and to destruction of the mounts within a very short time.
Radiant heat can give rise to high temperatures on the exposed surfaces of elastomer bodies, even at relatively low overall ambient temperatures. The surface can harden if exposed to intense radiant heat for a longer period of time and then crack under dynamic stress.
If MEGI elements are used at very low temperatures, the stiffness rises rapidly and the elastomer becomes as hard as glass, in which state it is sensitive to impact stress.
